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Annual variations of the $^{214}$Po, $^{213}$Po and $^{212}$Po half-life values

Annual variations of the $^{214}$Po, $^{213}$Po and $^{212}$Po half-life values

Authors :
Alexeev, E. N.
Gangapshev, A. M.
Gavrilyuk, Yu. M.
Gezhaev, A. M.
Kazalov, V. V.
Kuzminov, V. V.
Panasenko, S. I.
Petrenko, O. D.
Ratkevich, S. S.
Alexeev, E. N.
Gangapshev, A. M.
Gavrilyuk, Yu. M.
Gezhaev, A. M.
Kazalov, V. V.
Kuzminov, V. V.
Panasenko, S. I.
Petrenko, O. D.
Ratkevich, S. S.
Publication Year :
2020

Abstract

Results of a comparative analysis of the $^{214}$Po ($T_{1/2}= 163.47\pm0.03$ $\mu$s), $^{213}$Po ($T_{1/2}=3.705 \pm 0.001$ $\mu$s) and $^{212}$Po ($T_{1/2}=294.09\pm0.07$ ns) half-life annular variation parameters are presented. It is shown that two independent sequential sets of the $^{214}$Po $\tau$-values $(\tau\equiv T_{1/2})$ obtained in the spaced laboratories can be described by sinusoidal functions. The sinusoid curve with amplitude $A=(5.0 \pm1.5) \cdot 10^{-4}$, period $\omega=(365\pm 8)$ days, and phase $\phi=(170 \pm 7)$ days approximates the set of $^{214}$Po $\tau$ values obtained at BNO INR RAS during the $\sim$973 days starting on January 4, 2012. The function approximates a set of $\tau$-values with a time duration of $\sim1460$ days obtained at the KhNU has an amplitude $A=(4.9\pm1.8)\cdot10^{-4}$, a period $\omega= (377\pm13)$ days and a phase $\phi=(77\pm10)$ days. The $^{213}$Po $\tau$-value set with a time duration of $\sim1700$ days can be described by a sinusoidal function with an amplitude $A=(3.9\pm1.2)\cdot10^{-4}$, a period $\omega= (370\pm13)$ days and a phase $\phi=(130\pm9)$ days. The $^{212}$Po $\tau$-value set with a time duration of $\sim670$ days can be described by a sinusoidal function with an amplitude $A=(7.5\pm1.6)\cdot10^{-4}$, a period $\omega= (375\pm13)$ days and a phase $\phi=(40\pm10)$ days.<br />Comment: 6 pages, 5 figures, Prepared for the proceedings of The 5th International Conference on Particle Physics and Astrophysics (ICPPA-2020)

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1363535779
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1088.1742-6596.1690.1.012029